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Nanoscale research letters

Thin and long silver nanowires self-assembled in ionic liquids as a soft template: electrical and optical properties.


PMID 25024690

Abstract

Thin and long silver nanowires were successfully synthesized using the polyvinylpyrrolidone (PVP)-assisted polyol method in the presence of ionic liquids, tetrapropylammonium chloride and tetrapropylammonium bromide, which served as soft template salts. The first step involved the formation of Ag nanoparticles with a diameter of 40 to 50xa0nm through the reduction of silver nitrate. At the growing stage, the Ag nanoparticles were converted into thin and long one-dimensional wires, with uniform diameters of 30 ± 3xa0nm and lengths of up to 50xa0μm. These Ag nanowires showed an electrical conductivity of 0.3 × 10(5)xa0S/cm, while the sheet resistance of a two-dimensional percolating Ag nanowire network exhibited a value of 20 Ω/sq with an optical transmittance of 93% and a low haze value.